"What would you like?" Flight attendants ask passengers that question dozens and dozens of times each flight.

Recently, one of our Airfarewatchdog fans asked us to compile a list of drink and snack prices for domestic flights. Beer, wine, cocktails and/or snacks are usually offered on each flight yet prices and menu items vary from one airline to another. My favorite drink while flying: Salvador's Premixed Margarita on Continental Airlines.

For economy class flights within the U.S., here are the drink and snack prices we found.

International Flights: Delta and Northwest offer complimentary beer and wine in economy class for international flights of six hours or more. American, United and US Airways? Since there is no written confirmation on their websites, we're still verifying whether or not these three airlines provide complimentary beer and wine for economy class passengers on international flights.

Credit/Debit - No Cash: Most airlines now have cashless cabins where payment for drinks or snacks will only be allowed by credit or debit card. For those who do not have a credit or debit card, some airlines will allow you to buy in-flight coupons or vouchers. These vouchers must be bought before you get on the plane. Check with your airline representative at the ticket counter or gate so you know how to pay for a drink or snack.

Drink Deal! Purchase a Southwest $15 drink coupon book at a ticket counter or gate, and receive 4 drink vouchers. 4 drinks for the price of three - just for you and your friends.

As a reminder, alcoholic beverages are for adults 21 and older. Flight attendants will not be afraid to ask you for your ID, so keep your credit card and identification handy.

Remember; moderation is key when drinking on a flight. The last thing you want to do is get into trouble with a flight attendant while having one too many cocktails. Play it cool and have a nice trip!